Open heart surgery and labor

emily
I had open heart surgery when I was 16 years old, I got pregnant at 19 and had a cardiologist say my heart was fine and id be okay. That ended in a miscarriage. 
I'm currently 21 and pregnant, 10 weeks 2 days. I'm still not sure what my doctor is going to want to do? Keep a close eye on the babies heart? Make me have a c section? 
Has anyone else had experience with this? What happened? What did they do?
I'm just nervous and not sure what to expect..